MSAL B2C failing to retrieve cached accounts of external users

[manzielyse]

Describe the bug I am building an app that uses MSAL B2C to authenticate users. Getting a token interactively works as expected for all users but getting a token silently fails only for external users (Guests) but for members of the tenant I can get a token silently.

Smartphone (please complete the following information):

• Device: Pixel 6a, Pixel 7 Pro
• Android Version: 14
• Browser default
• MSAL Version 5.2.1

Stacktrace

2024-04-12 10:26:32.997 MsalOAuth2...getAccount W [2024-04-12 08:26:32 - thread_name: pool-12-thread-2, correlation_id: UNSET - Android 34] No matching account found. 2024-04-12 10:26:33.008 SilentToke...Parameters W [2024-04-12 08:26:33 - thread_name: pool-18-thread-4, correlation_id: 93f25388-d565-4fce-b626-4250bebf3bb6 - Android 34] The account set on silent operation parameters is NULL. 2024-04-12 10:26:33.010 System.out I Error: com.microsoft.identity.client.exception.MsalClientException: No cached accounts found for the supplied homeAccountId and clientId

To Reproduce Steps to reproduce the behavior: Invite guest user to tenant and login using b2c configuration.

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Expected behavior Expected to get access token silently / automatically

Actual Behavior Fails with error "Error: com.microsoft.identity.client.exception.MsalClientException: No cached accounts found for the supplied homeAccountId and clientId"

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